Trim the wick roughly 6mm before each lighting. Failure to do so can cause the flame to get too large and create a hazard.
Avoid trimming the wick too short or the flame may extinguish in the wax.
If you don't have a stove lighter or long matches handy, a great trick is to use a piece of dry spaghetti.
When burning your candle for the first time, allow the wax to melt all the way to the edges of the jar before extinguishing. Soy wax has a memory, so if the candle is not melted all the way to the side, the candle may tunnel.
Keep lit candles away from drafts as they may cause the candle to burn unevenly. If the candle is burning unevenly, carefully extinguish the flame and adjust the wick so that it is centered.
For the best experience, don't allow your candle to burn for more than 6 hours at a time. The wax should be left to completely set before relighting.
The best way to fix tunnelling is to wrap a layer of foil around the outside of your candle to trap in the heat and melt the sides. Keep an eye on the candle as the flame may be flooded out with the excess wax.
If the tunnelling is too severe, you may need to scrape a layer of the wax out. The excess wax is great to use in oil burners and tart warmers.
The best way to extinguish your candle is to push the wick into the liquid wax with a chopstick or wick dipper, then straighten it back out. By dipping the wick you are re-establishing its wax coating and preparing it for the next burn.
Frosting (a white discolouration of the wax) is a natural characteristic of soy wax and doesn't affect the burning of the candle.
Soy wax, when it is heated to a certain temperature, will start to gather moisture upon the top of the candle. This is called sweating. It will not affect the burning of the candle and can be gently wiped off with a tissue or paper towel.